Segment hoisting equipment and hoisting method

Abstract

The present application provides a pipe segment lifting device and a lifting method, which relate to the technical field of shaft construction. The device includes a hanger unit and a sling unit. The hanger unit includes a main hanger, and one side of the main hanger has a support portion and a connector. The support portion is used to abut against the inner wall of the pipe segment, and the connector is used to connect to the top of the pipe segment. The sling unit includes a mobile body and a plurality of sling assemblies, each sling assembly is respectively connected to the mobile body and the hanger unit. A counterweight is also provided on the side of the main hanger away from the support portion, which is used to make the center of gravity of the hanger unit before and after lifting be located within the lifting force distribution range between each sling assembly. The mobile body is configured to drive the main hanger downward through each sling assembly to transfer the pipe segment to a predetermined installation position in the shaft where the pipe segment is installed. The pipe segment lifting device and the lifting method provided in the present application can realize accurate and stable lifting of the pipe segment in the shaft.

Description

Technical Field

[0001] The present application relates to the technical field of vertical shaft construction, and in particular to a segment hoisting device and a segment hoisting method. Background Art

[0002] After the shaft is excavated, it usually needs to be supported, for example, using pipe segments or steel structures to prevent collapse.

[0003] In the related art, block-type pipe segments are stacked in a ring shape and pressed against the well wall to form support.

[0004] However, for a vertical shaft with a wellhead smaller than the shaft interior, existing lifting equipment is not convenient for lifting the pipe segments stably and accurately to the predetermined position. Summary of the Invention

[0005] The present application provides a segment hoisting device and a segment hoisting method to solve the problem that it is inconvenient to stably and accurately hoist the segment to a predetermined position during the existing shaft construction process.

[0006] In order to achieve the above-mentioned objectives, in a first aspect, the present application provides a segment hoisting device, comprising a hanger unit and a sling unit;

[0007] The hanger unit includes a main hanger, one side of which has a support portion and a connector, the support portion is used to abut against the inner wall of the pipe segment, and the connector is used to connect with the top of the pipe segment;

[0008] The sling unit includes a mobile body and multiple sling assemblies, one end of each sling assembly is connected to the mobile body, and the other end of each sling assembly is connected to the hanger unit. A counterweight is also provided on the side of the main hanger away from the support portion. The counterweight is used to ensure that the center of gravity of the hanger unit is within the lifting force distribution range between the sling assemblies before and after lifting.

[0009] The mobile body is configured to drive the main hanger to move downward through each sling assembly to move the pipe segment to a predetermined installation position in the vertical shaft for installing the pipe segment.

[0010] In a possible implementation, the hanger unit further includes a secondary hanger, and the main hanger is connected to each sling assembly via the secondary hanger;

[0011] The main hanger rotates relative to the auxiliary hanger so that the support portion faces different directions of the well wall in the horizontal plane.

[0012] In a possible implementation, a first connection portion is provided above the main hanger, and a second connection portion matching the first connection portion is provided at the bottom of the auxiliary hanger, and the first connection portion is rotatably connected to the second connection portion.

[0013] In a possible implementation, a rolling element is provided on one of the first connecting portion and the second connecting portion, and the rolling element is in rolling contact with the other connecting portion.

[0014] In a possible implementation, the hanger unit further includes a limiting member, which is disposed between the main hanger and the auxiliary hanger and is used to limit relative rotation between the main hanger and the auxiliary hanger.

[0015] In one possible implementation, the limiting member is movably connected to one of the main hanger and the auxiliary hanger, and the other has a limiting portion that matches the limiting member, and a plurality of limiting portions are arranged at intervals around the rotation axis of the main hanger;

[0016] The limiting member moves toward the limiting portion and abuts against the limiting portion to be locked;

[0017] Alternatively, the limiting member moves in a direction away from the limiting portion and disengages from the limiting portion to release the lock.

[0018] In a possible implementation, there are four sling assemblies, which are arranged in a circular array in a horizontal plane, and the rotation center of the main hanger coincides with the center surrounded by the four sling assemblies.

[0019] In a possible implementation, the connecting member is a flexible chain, one end of the flexible chain is connected to the main hanger, and the other end of the flexible chain is used to connect to the pipe segment.

[0020] In one possible implementation, the mobile body includes a first lateral movement component and a second lateral movement component;

[0021] The sling assembly is connected to the second lateral movement assembly, and the second lateral movement assembly is used to drive the segment to move along the second lateral direction;

[0022] The second lateral movement assembly is connected to the first lateral movement assembly, and the first lateral movement assembly is used to drive the segment to move along the first lateral direction through the second lateral movement assembly;

[0023] The second horizontal direction is perpendicular to the first horizontal direction.

[0024] In a second aspect, the present application further provides a segment hoisting method, using any segment hoisting device provided in the first aspect, the segment hoisting method comprising:

[0025] The weight of the counterweight is adjusted according to the weight of the segments so that the center of gravity of the hanger unit before and after lifting is within the range of the lifting force distribution between the sling assemblies;

[0026] The support part on the main hanger is placed against the inner wall of the segment and connected to the top of the segment through the connector;

[0027] The mobile body drives the main hanger to move downward through the various sling assemblies to move the pipe segment to a predetermined installation position in the vertical shaft for installing the pipe segment.

[0028] The present application provides a segment hoisting device and method. The segment hoisting device comprises a hanger unit and a sling unit. The hanger unit comprises a main hanger. A support portion and a connector are provided on one side of the main hanger. The support portion abuts against the inner wall of the segment and is connected to the top of the segment via the connector to hoist the segment. The sling unit comprises a mobile body and multiple sling assemblies. Each sling assembly is connected at one end to the mobile body and at the other end to the hanger unit. The mobile body translates the hanger unit, and the sling assemblies lift and lower the hanger unit. A counterweight is provided on the side of the main hanger facing away from the support portion, ensuring that the center of gravity of the hanger unit before and after hoisting is within the range of the lifting force distribution between the sling assemblies. The center of gravity of the main hanger moves within this range before and after hoisting the segment, maintaining stability. The mobile body is configured to drive the main hanger downward via the sling assemblies to transfer the segment to a predetermined installation location in the vertical shaft where the segment is to be installed. Therefore, the pipe segment hoisting equipment and hoisting method provided in the present application can accurately and stably place the pipe segment on the well wall where the wellhead is small and the well interior is large, and ensure the safety of the hoisting. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0030] Figure 1 This is a partial structural diagram of the segment support at the starting section of a shaft in the prior art;

[0031] Figure 2 A schematic diagram of a portion of the structure of the segment hoisting equipment provided in an embodiment of the present application;

[0032] Figure 3 A diagram showing the change in the center of gravity of the segment hoisting equipment provided in an embodiment of the present application when lifting or lowering a segment;

[0033] Figure 4 for Figure 2 Enlarged view of point A in the middle;

[0034] Figure 5 for Figure 2 A partial view of another embodiment at B;

[0035] Figure 6 A structural diagram of the segment hoisting equipment provided in an embodiment of the present application in a hoisting state;

[0036] Figure 7 for Figure 6A partial view from another angle at point C in the middle;

[0037] Figure 8 A partial structural diagram of the segment hoisting equipment provided in an embodiment of the present application in another hoisting state;

[0038] Figure 9 A flow chart of a method for hoisting pipe segments provided in an embodiment of the present application.

[0039] Reference numerals:

[0040] 10: Segment;

[0041] 11: hanging part;

[0042] 20: vertical shaft;

[0043] 100: hanger unit;

[0044] 110: Main hanger;

[0045] 111: support part;

[0046] 112: Connector;

[0047] 113: counterweight;

[0048] 114: first connecting portion;

[0049] 115: limiting part;

[0050] 120: auxiliary hanger;

[0051] 121: second connecting portion;

[0052] 122: rolling element;

[0053] 123: hanging lug;

[0054] 130: limiter;

[0055] 200: sling unit;

[0056] 210: moving subject;

[0057] 211: first lateral movement component;

[0058] 212: second lateral movement component;

[0059] 220: Sling assembly.

[0060] The above drawings illustrate specific embodiments of the present application, which will be described in more detail below. These drawings and the textual description are not intended to limit the scope of the present application in any way, but rather to illustrate the concepts of the present application to those skilled in the art by reference to specific embodiments. DETAILED DESCRIPTION

[0061] Exemplary embodiments will be described in detail herein, with examples illustrated in the accompanying drawings. In the following description, when referring to the drawings, identical numerals in different figures represent identical or similar elements, unless otherwise indicated. The embodiments described in the following exemplary embodiments are not intended to represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present application, as detailed in the appended claims.

[0062] As mentioned in the background technology section, Figure 1 As shown, when the starting section of the vertical shaft is excavated, the wellhead is first cast and hardened to form a well seat, and then the vertical shaft 20 is excavated vertically. At this time, the internal size of the vertical shaft is larger than the wellhead size, and the pipe segments 10 are stacked one by one on the well wall to form a support. Among them, in the process of stacking the pipe segments 10, one is to use a single hook of a crane for lifting, and use a hand winch to pull the pipe segments 10 that were originally vertically downward to deviate from the bottom of the crane and move closer to the well wall. This method is difficult to implement and cannot accurately stack the pipe segments 10. It has great safety risks and hidden dangers, and there are many uncertainties in the operation. The second is to install a ring rail at the top of the well, and to install the pipe segments 10 by lifting them through the ring rail. This method cannot install the last layer of pipe segments 10, and the ring rail must be removed, and the disassembly and assembly takes a long time. Therefore, the existing lifting method is not convenient for stably and accurately lifting the pipe segments to the predetermined position in the vertical shaft.

[0063] In order to solve the above-mentioned problems in the process of placing pipe segments in a well with a small wellhead and a large well interior, the present application provides a pipe segment lifting device, including a hanger unit and a sling unit. The hanger unit includes a main hanger. By providing a support portion and a connecting piece on one side of the main hanger, the support portion abuts against the inner wall of the pipe segment and is connected to the top of the pipe segment through the connecting piece to lift the pipe segment. The sling unit includes a mobile body and multiple sling assemblies. By connecting one end of each sling assembly to the mobile body and the other end of each sling assembly to the hanger unit, the hanger unit is translated by the mobile body and raised and lowered by the sling assemblies. By providing a counterweight on the side of the main hanger away from the support portion, the center of gravity of the hanger unit before and after lifting is within the lifting force distribution range between the sling assemblies, and the center of gravity of the main hanger before and after lifting the pipe segment moves within this range to maintain stability. The mobile body is configured to drive the main hanger downward through the various sling assemblies to move the segments to the predetermined installation locations within the vertical shaft where they are installed. This allows for accurate and stable placement of the segments on the shaft wall, where the wellhead is small and the shaft interior is large, while ensuring safe installation.

[0064] The technical solution of the present application will be described in detail below with reference to the accompanying drawings and several specific embodiments. It will be understood that the following embodiments can be combined or used individually.

[0065] First, this embodiment provides a segment hoisting device, comprising a hanger unit 100 and a sling unit 200. The hanger unit 100 includes a main hanger 110, one side of which has a support portion 111 and a connector 112. The support portion 111 is configured to abut against the inner wall of the segment 10, and the connector 112 is configured to connect to the top of the segment 10.

[0066] The sling unit 200 includes a mobile body 210 and multiple sling assemblies 220. The mobile body 210 is located above the vertical shaft 20. One end of each sling assembly 220 is respectively connected to the mobile body 210, and the other end of each sling assembly 220 is respectively connected to the side of the hanger unit 100 away from the support part 111. A counterweight 113 is also provided on the side of the main hanger 110 away from the support part 111. The counterweight 113 is used to make the center of gravity of the hanger unit 100 before and after lifting be located within the lifting force distribution range between each sling assembly 220.

[0067] The mobile body 210 is configured to drive the main hanger 110 downward via the sling assemblies 220 to move the segment 10 to a predetermined installation position within the shaft 20 for installing the segment 10. Alternatively, the mobile body 210 drives the main hanger 110 to move away from the shaft wall via the sling assemblies 220, and the multiple sling assemblies 220 drive the main hanger 110 upward to move the main hanger 110 away from the predetermined installation position.

[0068] In this embodiment, Figure 2 As shown, the hanger unit 100 is used to hang and support the pipe segment 10. The hanger unit 100 includes at least a main hanger 110. The main hanger 110 can be a supporting frame structure. A support portion 111 and a connector 112 are provided on one side of the main hanger 110. The support portion 111 is used to abut against the inner wall of the pipe segment 10 for support, that is, to abut against the concave surface of the pipe segment 10. The connector 112 is used to connect with the top of the pipe segment 10 to achieve hanging. The connector 112 can be a hook, chain, etc., and a lifting ear, hook, etc. for hanging can be pre-embedded in the top of the pipe segment 10. Multiple connectors 112 can be provided.

[0069] The sling unit 200 is used to move the hanger unit 100. The sling unit 200 includes a mobile body 210 and a plurality of sling assemblies 220. The mobile body 210 is used to drive the hanger unit 100 and the suspended segment 10 to move horizontally. The mobile body 210 can be a crane, a traveling crane, a hoist, etc. located above the shaft 20. The sling assembly 220 is used to drive the hanger unit 100 and the suspended segment 10 to move vertically. The sling assembly 220 can be composed of a sling and a capstan motor (not shown in the figure). The capstan motor is mounted on the mobile body 210. The plurality of slings are arranged vertically and are directly connected to the hanger unit 100 or indirectly connected to the hanger unit 100 via a connecting component.

[0070] A counterweight 13, such as a plurality of counterweight blocks, is further provided on the side of the main hanger 110 facing away from the support portion 111. The counterweight blocks are detachably connected to the main hanger 110 via a suspension rod or the like, and the total weight of the counterweight blocks is adjusted according to the weight of the suspended segment 10. By configuring the weight of the counterweight 13, the center of gravity of the hanger unit 100 when lifting or lowering a segment 10 can be positioned within the range of the lifting force distribution between the sling assemblies 220, such as the center of gravity falling on the line connecting two sling assemblies 220 or the area enclosed by the lines connecting multiple sling assemblies 220.

[0071] Here, the force is described by taking two sling assemblies 220 as an example. Figure 3 As shown, if G1 is the weight of the pipe segment 10, G2 is the weight of the counterweight 113, G3 is the dead weight of the hanger unit 100, F1 and F2 are the tensions on the two sling assemblies 220, when the pipe segment 10 is lifted, the center of gravity on the hanger unit 100 falls on O1, and the tension is mainly borne by F1; when the pipe segment 10 is lowered, the center of gravity on the hanger unit 100 moves to O2, and the tension is mainly borne by F2, that is, the center of gravity on the hanger unit 100 always falls on the connecting line between the two sling assemblies 220.

[0072] Taking three or more sling assemblies 220 as an example to illustrate the force, which is not shown in the figure, when the pipe segment 10 is lifted, the center of gravity on the hanger unit 100 falls on O1, and when the pipe segment 10 is lowered, the center of gravity on the hanger unit 100 moves to O2, that is, the center of gravity on the hanger unit 100 always falls within the triangular area surrounded by the lines connecting the three sling assemblies 220, or the polygonal area surrounded by the lines connecting multiple sling assemblies 220, that is, the center of gravity on the hanger unit 100 always falls within the area surrounded by the lines connecting multiple sling assemblies 220.

[0073] Specifically, during hoisting, the mobile body 210 drives the main hanger 110 to move toward the well wall through the sling assemblies 220. Figure 8The X axis moves in the positive direction, and each sling assembly 220 drives the main hanger 110 to move downward, such as along Figure 8 The Z axis moves in the opposite direction to move the segment 10 to the predetermined installation position in the shaft 20, and separate the connector 112 from the segment 10 to quickly and accurately complete the installation of the segment 10. Alternatively, the mobile body 210 drives the main hanger 110 to move away from the shaft wall through the sling assemblies 220, such as along Figure 8 The X axis moves in the opposite direction, and each sling assembly 220 drives the main hanger 110 to move upward, along Figure 8 The middle Z axis moves forward to leave the predetermined installation position and return to the original position to carry out the hoisting of the next pipe segment 10.

[0074] It should be noted that the sling assemblies 220 on the side closest to the support portion 111 should be as close as possible while also leaving sufficient distance to prevent interference between the sling assemblies 220 and the inner wall of the wellhead when the segment 10 is moved to the predetermined installation location. Furthermore, the distances between the connection points of the multiple sling assemblies 220 on the main hanger 110 and the support portion 111 and counterweight 113 can be calculated by simulating the weight of the segment 10, thereby determining the specific weight of the counterweight 113.

[0075] It can be understood that compared with the prior art, in which the center of gravity of the pipe segment 10 changes front and back during the operation of single-hook lifting, causing the lifting equipment to deflect and swing, the lifting equipment in this embodiment always keeps the center of gravity on the hanger unit 100 within the lifting force distribution range between the sling assemblies 220 after lifting or lowering the pipe segment 10, thereby basically ensuring that the hanger unit 100 is stable without deflection, swinging, etc., thereby ensuring the safety of the lifting.

[0076] Therefore, this embodiment provides a pipe segment hoisting device that can accurately and stably place the pipe segment 10 on the well wall where the wellhead is small and the well interior is large, and ensures the safety of the hoisting, basically eliminating safety hazards.

[0077] In one possible design, the hanger unit 100 further includes a secondary hanger 120, through which the main hanger 110 is connected to each sling assembly 220. The main hanger 110 rotates relative to the secondary hanger 120 so that the support portion 111 faces different directions of the well wall in the horizontal plane.

[0078] Specifically, if Figure 2As shown, the auxiliary hanger 120 serves as a transition between the sling assembly 220 and the main hanger 110. The auxiliary hanger 120 may also be a frame structure. The auxiliary hanger 120 may be connected to the main hanger 110 via a rotating component or rotating structure such as a bearing. The rotation axis is vertical and located between the support portion 111 and the counterweight 113. This facilitates a small range of rotation of the main hanger 110 relative to the auxiliary hanger 120 to adjust the support portion 111 to different directions, thereby facilitating the installation of the segments 10 at different locations.

[0079] It should be noted that there are at least three sling assemblies 220, so that the center of gravity of the main hanger 110 always falls within the area enclosed by the lines connecting the multiple sling assemblies 220. In addition, the main hanger 110 can be adjusted by manual rotation or by providing a rotary drive between the main hanger 110 and the auxiliary hanger 120.

[0080] Furthermore, in this embodiment, a first connection portion 114 is provided above the main hanger 110 , and a second connection portion 121 matching the first connection portion 114 is provided at the bottom of the auxiliary hanger 120 , and the first connection portion 114 is rotatably connected to the second connection portion 121 .

[0081] For example, in combination Figure 2 、 Figure 4 As shown, the first connecting portion 114 can be a swivel groove with a radially oriented notch. The second connecting portion 121 can be a flange that matches the swivel groove and faces the swivel groove, forming a rotational connection between the flange and the swivel groove. The notch can face radially outward or radially inward, and the flange can be continuous or discontinuous. The secondary hanger 120 can be provided with a lifting lug 123 corresponding to the sling assembly 220 to facilitate connection.

[0082] Of course, the first connection portion 114 and the second connection portion 121 may also be replaced by other components with a rotational connection function, such as a cross roller bearing, etc., which is not specifically limited in this embodiment.

[0083] Furthermore, in this embodiment, a rolling element 122 is provided on one of the first connecting portion 114 and the second connecting portion 121, and the rolling element 122 is in rolling contact with the other connecting portion, thereby reducing the frictional resistance of the relative rotation between the first connecting portion 114 and the second connecting portion 121.

[0084] In some examples, such as Figure 4 As shown, the rolling element 122 can be a roller, a rolling bearing or the like, and is mounted on the second connection portion 121 and in rolling contact with the rotating surface of the first connection portion 114. In this way, a portion of the resistance between the first connection portion 114 and the second connection portion 121 can be reduced.

[0085] In other examples, not shown, the rolling element 122 can also be mounted on the first connection portion 114 and in rolling contact with the rotating surface of the second connection portion 121. This can also reduce some of the resistance between the first connection portion 114 and the second connection portion 121. Of course, the rolling element 122 can also be mounted elsewhere between the first connection portion 114 and the second connection portion 121, as long as the rolling contact reduces the rotational resistance, and this is not specifically limited in this embodiment.

[0086] In order to facilitate locking the orientation after rotating the main hanger 110, in this embodiment, the hanger unit 100 also includes a limiter 130, which is arranged between the main hanger 110 and the auxiliary hanger 120 and is used to limit the relative rotation between the main hanger 110 and the auxiliary hanger 120.

[0087] That is, the main hanger 110 and the auxiliary hanger 120 can be locked or unlocked by operating the stopper 130. For example, the stopper 130 can be a latch mechanism, a brake mechanism, etc. provided between the main hanger 110 and the auxiliary hanger 120.

[0088] For example, in this embodiment, a stopper 130 is movably connected to one of the main hanger 110 and the auxiliary hanger 120. The other hanger has a stopper 115 that matches the stopper 130. A plurality of stoppers 115 are provided at intervals around the rotation axis of the main hanger 110. The stopper 130 moves toward the stopper 115 and abuts against the stopper 115, thereby locking the stopper 130. Alternatively, the stopper 130 moves away from the stopper 115 and disengages from the stopper 115, thereby releasing the lock.

[0089] In some examples, such as Figure 5 As shown, the stopper 130 can be a latch pin inserted into the secondary hanger 120, and the stopper 115 can be a pin hole that matches the latch pin. A plurality of pin holes are provided at intervals around the rotation axis of the main hanger 110. The latch pin is moved toward the pin hole and inserted into the pin hole to achieve locking. Removing the latch pin releases the lock, allowing the main hanger 110 to rotate.

[0090] In other examples, not shown, latches can be inserted into the main hanger 110, with pin holes spaced apart on the auxiliary hanger 120 around the rotation axis of the main hanger 110. Locking can also be achieved by moving the latch toward the pin hole and inserting it into the hole. Removing the latch releases the lock, allowing rotation of the main hanger 110. The specific number of pin holes and the specific locations of the latches and pin holes can be determined based on practical needs and are not specifically limited in this embodiment.

[0091] In order to make the force applied during sling lifting more balanced, in this embodiment, there are four sling assemblies 220, and the four sling assemblies 220 are arranged in a circular array in the horizontal plane. The rotation center of the main hanger 110 coincides with the center surrounded by the four sling assemblies 220.

[0092] In this way, if Figure 6 As shown, when the main hanger 110 rotates in different directions in the horizontal plane, the center of gravity of the hanger unit 100 always falls within the square area enclosed by the lines connecting the four sling assemblies 220, thereby achieving stable hanging in all directions. Of course, a larger number of sling assemblies 220 can also be provided, and this is not limited to this in this embodiment.

[0093] In order to facilitate the connection and disassembly of the pipe segment 10 , in this embodiment, the connecting member 112 is a flexible chain, one end of the flexible chain is connected to the main hanger 110 , and the other end of the flexible chain is used to connect to the pipe segment 10 .

[0094] In this way, if Figure 7 As shown, the flexible chain is an iron chain. When the pipe segment 10 is hoisted into place, the main hanger 110 is further moved downward so that the flexible chain is in a relaxed state, and then manually disassembled to avoid the situation where the flexible chain cannot be disassembled due to the rigid connection of the connecting piece 112 during the disassembly process, and to avoid the problem that the main hanger 110 and the pipe segment 10 cannot be disassembled due to relative movement during the disassembly process, thereby ensuring safety.

[0095] Of course, the connecting member 112 can also be replaced by other components with flexible connections, such as a wire rope, etc., which is not specifically limited in this embodiment.

[0096] To achieve stable horizontal movement of the hanger unit 100, in this embodiment, the mobile body 210 includes a first lateral movement assembly 211 and a second lateral movement assembly 212. The sling assembly 220 is connected to the second lateral movement assembly 212, which is used to drive the segment 10 in a second lateral direction. The second lateral movement assembly 212 is connected to the first lateral movement assembly 211, which is used to drive the segment 10 in a first lateral direction via the second lateral movement assembly 212. The second lateral direction is perpendicular to the first lateral direction.

[0097] Specifically, if Figure 6 As shown, the second transverse moving assembly 212 can drive the sling assembly 220 and the hanger unit 100 along Figure 6 The second lateral movement component 212 can be a telescopic mechanism arranged along the X-axis direction, a linear movement mechanism (such as a roller travel mechanism driven by a motor), etc., as long as it can achieve stable lateral movement. In this embodiment, there are no excessive restrictions on this.

[0098] The first transverse moving assembly 211 can drive the second transverse moving assembly 212, the sling assembly 220 and the hanger unit 100 to move along the Figure 6 The first lateral moving assembly 211 may also be a telescopic mechanism or a linear moving mechanism (such as a roller traveling mechanism driven by a motor) arranged along the Y-axis direction. The first lateral moving assembly 211 may be arranged on a support frame above the shaft 20. In this embodiment, no further restrictions are imposed on this.

[0099] like Figure 9 As shown, in a second aspect, this embodiment further provides a method for hoisting a pipe segment, using the pipe segment hoisting equipment provided by any of the above embodiments. The structure of the pipe segment hoisting equipment is described in detail in the above embodiments and will not be repeated here.

[0100] It is understandable that if Figure 7 As shown, the hanging portion 11 can be a hanging ear, ear seat, hook, etc., embedded in the pipe segment 10 near the top, and the connecting member 112 can be a chain, hook, etc., to achieve hanging. Specifically, multiple hanging portions 11 and connecting members 112 can be provided, and they correspond one to one to ensure balanced lifting forces. The specific number and position can be determined according to actual needs and are not specifically limited in this embodiment.

[0101] The segment lifting method includes the following steps:

[0102] S101 , adjusting the weight of the counterweight 113 according to the weight of the segment 10 so that the center of gravity of the hanger unit 100 before and after hanging is located within the range of the hanging force distribution between the sling assemblies 220 .

[0103] Specifically, combined Figure 2 、 Figure 3 As shown, the counterweight 113 can be composed of multiple counterweight blocks. The number of counterweight blocks can be increased or decreased according to the weight of the pipe segment 10 to be hoisted so that the center of gravity O2 of the hanger unit 100 before hoisting is close to the side of the counterweight 113, and the center of gravity O1 after hoisting is close to the side of the pipe segment 10, without exceeding the lifting force distribution range between the sling assemblies 220.

[0104] S102 , the support portion 111 on the main hanger 110 is brought into contact with the inner wall of the segment 10 , and connected to the top of the segment 10 via the connector 112 .

[0105] Specifically, the support portion 111 on the main hanger 110 is pressed against the inner wall of the pipe segment 10, that is, the support portion 111 is pressed against one side of the arc-shaped concave surface of the pipe segment 10, and then the top of the pipe segment 10 is connected through the connecting piece 112 to complete the preparation before lifting.

[0106] S103 , the mobile body 210 drives the main hanger 110 to move downward through the sling assemblies 220 to move the segment 10 to a predetermined installation position in the shaft 20 for installing the segment 10 .

[0107] Specifically, the mobile body 210 drives the main hanger 110 to move toward the well wall through each sling assembly 220, and each sling assembly 220 drives the main hanger 110 to move downward to move the pipe segment 10 to the predetermined installation position in the vertical shaft 20, thereby completing the installation of the pipe segment 10 quickly and accurately.

[0108] Therefore, the pipe segment hoisting method provided in this embodiment, by adopting the above-mentioned pipe segment hoisting equipment, can accurately and stably place the pipe segment 10 on the well wall where the wellhead is small and the well interior is large, and ensure the safety of the hoisting, basically eliminating safety hazards.

[0109] In addition, when the current pipe segment 10 is hoisted, the connecting piece 112 needs to be separated from the pipe segment 10, and the mobile body 210 drives the main hanger 110 to move away from the well wall through each sling assembly 220, and each sling assembly 220 drives the main hanger 110 to move upward to return to its original position, so as to hoist the next pipe segment 10.

[0110] It should be noted that when separating the connecting piece 112 from the pipe segment 10, the main hanger 110 needs to be moved down first so that the connecting piece 112 and the pipe segment 10 are in a loose state before the connecting piece 112 is removed to prevent the connecting piece 112 from rebounding and injuring the operator at the moment of loosening from the pipe segment 10.

[0111] Those skilled in the art will readily appreciate other embodiments of the present application after considering the specification and practicing the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present application that follow the general principles of the present application and include common knowledge or customary techniques in the art not disclosed herein. The description and examples are to be considered as exemplary only, and the true scope and spirit of the present application are indicated by the following claims.

[0112] It should be understood that the present application is not limited to the exact structure described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present application is limited only by the appended claims.

Claims

1. A segment hoisting device, characterized in that: including a hanger unit and a sling unit; The hanger unit includes a main hanger, and one side of the main hanger has a support portion and a connector, the support portion is used to abut against the inner wall of the pipe segment, and the connector is used to connect with the top of the pipe segment; The sling unit includes a mobile body and a plurality of sling assemblies, one end of each sling assembly is respectively connected to the mobile body, and the other end of each sling assembly is respectively connected to the hanger unit. A counterweight is further provided on the side of the main hanger away from the support portion, and the counterweight is used to ensure that the center of gravity of the hanger unit before and after lifting is located within the lifting force distribution range between the sling assemblies; The mobile body is configured to drive the main hanger to move downward through each of the sling assemblies to move the segment to a predetermined installation position in the shaft for installing the segment; The hanger unit further includes a secondary hanger, and the main hanger is connected to each of the sling assemblies via the secondary hanger; The main hanger rotates relative to the auxiliary hanger so that the support portion faces different directions of the well wall in the horizontal plane; A first connection portion is provided above the main hanger, and a second connection portion matching the first connection portion is provided at the bottom of the auxiliary hanger, wherein the first connection portion is rotatably connected to the second connection portion; A rolling element is provided on one of the first connecting portion and the second connecting portion, and the rolling element is in rolling contact with the other connecting portion.

2. The segment hoisting equipment according to claim 1, characterized in that: The hanger unit further includes a limiting member, which is arranged between the main hanger and the auxiliary hanger and is used to limit the relative rotation between the main hanger and the auxiliary hanger.

3. The segment hoisting equipment according to claim 2, characterized in that: The limiting member is movably connected to one of the main hanger and the auxiliary hanger, and the other one has a limiting portion matching the limiting member, and a plurality of limiting portions are arranged at intervals around the rotation axis of the main hanger; The limiting member moves toward the limiting portion and abuts against the limiting portion to be locked; Alternatively, the limiting member moves in a direction away from the limiting portion and disengages from the limiting portion to release the lock.

4. The segment hoisting equipment according to claim 1, characterized in that: There are four sling assemblies, which are arranged in a circular array in a horizontal plane. The rotation center of the main hanger coincides with the center surrounded by the four sling assemblies.

5. The segment hoisting equipment according to any one of claims 1 to 4, characterized in that: The connecting member is a flexible chain, one end of the flexible chain is connected to the main hanger, and the other end of the flexible chain is used to connect to the pipe segment.

6. The segment hoisting equipment according to any one of claims 1 to 4, characterized in that: The mobile body includes a first lateral movement component and a second lateral movement component; The sling assembly is connected to the second lateral movement assembly, and the second lateral movement assembly is used to drive the segment to move along the second lateral direction; The second transverse moving assembly is connected to the first transverse moving assembly, and the first transverse moving assembly is used to drive the segment to move along the first transverse direction through the second transverse moving assembly; Wherein, the second horizontal direction is perpendicular to the first horizontal direction.

7. A method for hoisting a pipe segment, characterized in that: Using the segment hoisting equipment according to any one of claims 1 to 6, the segment hoisting method comprises: The weight of the counterweight is adjusted according to the weight of the segment so that the center of gravity of the hanger unit before and after lifting is located within the range of the lifting force distribution between the sling assemblies; The supporting portion on the main hanger is brought into contact with the inner wall of the pipe segment and connected to the top of the pipe segment via the connecting piece; The mobile body drives the main hanger to move downward through each of the sling assemblies to move the pipe segment to a predetermined installation position in the vertical shaft for installing the pipe segment.

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